"My father thinks he is just trying to pull me back in his drama."

Once again, it's really not about you, Trusting. It sounds as if he is finally having to face the damage that he caused.

Did he discuss his emotions, any regrets about the situation?

M: 16 years
Bomb 4/07
OW 20s long gone
Divorced 11/09
I remarried New Guy
Cooperative r w/X regarding D